Watermarking method for h.264 video content authentication based on distribution ratio stability of principal component information
A technology of video content and authentication watermark, applied in the field of information security
Inactive Publication Date: 2019-05-31
ZHEJIANG UNIVERSITY OF MEDIA AND COMMUNICATIONS
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Problems solved by technology
Considering that each frame in the original domain of video is a static image, but due to the differences in coding compression and performance requirements between images and videos, the content-level authentication watermarking algorithm for digital images cannot be directly introduced into the video domain.
So far, no video watermarking literature that can resist secondary compression attacks has been reported. Research on H.264 / AVC video content-level authentication algorithms for secondary compression has become an urgent problem in this field.
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[0038] The technical scheme of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0039] Such as figure 1 In the block diagram shown, the Y component of each frame of the original video is first subjected to block-level 2-level DWT transformation, and the data block signature is established based on the key in the transform domain, and then the feature watermark is cross-embedded into other blocks based on the key. Low-frequency sub-band; when embedding the watermark, the method of quantizing and adjusting the distribution ratio of the first pivot information is adopted. During authentication, the authenticity of the content of the data block is judged by comparing the reconstructed features with the corresponding restored watermarks and combining the neighborhood features.
[0040] The H.264 video content authentication watermarking method in the present embodiment, concrete steps are as follows:
[0041] Step 1:...
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The present invention discloses an H.264 video content authentication watermark method based on principal element information distribution proportion stability. The method comprises the steps of carrying out the block 2-level DWT transformation on the Y component of each frame of an original video, establishing the data block characteristic codes based on the secret keys in a transformation domain, and crosswise embedding the characteristic watermarks in the low-frequency sub-bands of other blocks based on the secret keys; adopting a mode of quantifying the first principal element information distribution proportion when the watermarks are embedded; at authentication, determining the authenticity of the content of the data blocks by comparing the reconstructed characteristics and the correspondingly recovered watermarks, and combining the characteristics of the adjacent domains. The method of the present invention accords with the practical demands at the aspects, such as the safety, the transparency, the code rate influence, etc., can effectively distinguish the processing and the malicious manipulation of the video maintenance content on the conventional signal processing condition at and during the H.264 / AVC secondary compression, and can position the manipulation positions.
Description
technical field [0001] The invention relates to the field of information security, in particular to an H.264 video content authentication watermarking method based on the distribution ratio stability of principal component information. Background technique [0002] With the rapid development of multimedia processing technology and the emergence of various video editing software, video data can be easily tampered and forged, making it difficult to distinguish its authenticity. When it comes to court evidence, medical appraisal, military intelligence, national security and other fields, the tampering of video information may cause incalculable consequences. How to effectively identify the authenticity of digital video content has been widely concerned. [0003] At present, the technologies used for digital video content authentication mainly include perceptual hashing and digital watermarking technologies. Because video-aware hashing is used for content authentication, there...
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IPC IPC(8): H04N21/4402H04N21/4408H04N21/8358
CPCH04N19/176H04N19/467H04N19/63H04N21/440236H04N21/4408H04N21/8358
Inventor 付剑晶
Owner ZHEJIANG UNIVERSITY OF MEDIA AND COMMUNICATIONS